P-Orridge's Hebrew tattoo was photographed and submitted to BHT by Daniel:

As you can see, this tattoo is a brave attempt, but it doesn't quite work as intended. It roughly says "Psekakh Tav" Psekakh is just gibberish, though Tav actually has a meaning in Hebrew, it means "note".
When you want to transcribe a name, such as "Psychic TV", you have to pay attention to how it's pronounced. This is why in Hebrew "psychic" loses its P while the Y is expressed, and the letters of TV are written fully. The result is this:

Yep, if Psychic TV is your favorite band, now you know how to write its name for your very own Hebrew tattoo!